hdu 1001 Sum Problem(Java)

最新推荐文章于 2019-11-17 08:38:54 发布

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本文介绍了一个简单的编程挑战，即计算从1到n的所有整数之和，并提供了一个使用Java实现的具体示例。该任务来自HDOJ平台，旨在帮助初学者熟悉基本的循环和累积计算。

Problem Description

Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge).
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + … + n.

Input

The input will consist of a series of integers n, one integer per line.

Output

For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.

代码

import java.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            int n = sc.nextInt();
            int sum=0;
            for(int i=1;i<=n;i++){
                sum+=i;
            }
            System.out.println(sum);
            System.out.println();
        }

    }

}